Process of treating textile fabrics.



M. PETZOLD.

PROCESS OF TREATING TEXTILE FABRICS.

APPLICATION 111,21) SEPT. e, 1911.

1,058,459. j Pa ented Apr. 8, 1913.

mom/av UNITED. STATES PATENT OFFICE.

aux rE'rzoLn, or zrr'mu, .GEBM'ANY.

' rnoeass or TREATING. TEXTILE memes.

Specification of Letters Patent.

Application filed September 6, 1911. Serial No. 847,977.-

- Patented Apr. 8, 1913.

' treating the textile fabrics steeped in sodalyo for the urpose ofmercerization and almost comp etely delivered from 'lye by means ofsteam.

If the cotton fibers of the fabrics have left the parchment like stateinto which they had come, by being soaked with soda lye, the same entera flabby or flaccid state for a short time during which they are easilystretched in width. I have observed that this quickly passing flabby orflaccid state of the cotton fibers or the fabric which occurs afteralmost completely delivering the fabrics from soda lye by means of steammay be prolonged by the influence of the heat of the liquid for instanceby the heat'of a hot bath of water or weak lye.

My invention consists in stretching the fabric by means of clamps duringthe thuseflected prolongation of the above described state far beyondits original. width. This far extended stretching of' the fabric effectsa much higher gloss without shrinkage of the fabric taking place whenthe stretching is released.

According to the present invention the fabric is led through a hot bathof water or weak lye after being almost completely delivered from thesoda lye by means of steam. The effect of the bath is due to thetemper.- ature of the liquid forming the bathand not in the strength ofthe soda-lye used, the same being immaterial for the intended effect.

The new process may be explained with regard to an apparatus forcarrying the invention into effect which is diagrammatically shown inthe accompanying drawings, wherein:

Figure 1 is a longitudinal section through the same, whereas F i 2 is! atop plan view of the middle part 0 the apparatus.

Referring to the drawing, the apparatus comprises the casing 1 havingend walls 2,

and 6 extending into the trough 4 and the vat 5, respectively, providedatthe ends of the casing. In front of the trough 4 is the roller 7carrying the fabric to be treated,

stretching in wldth after the guide roll 8 and the width-stretching roll9., Within the trough 4 below the Wall 2 is a width-stretching roll 10.In the casing 1 are arranged in known manner the pairs of press rolls11,12 and 13, 14, and in front of each of these pairs are twowidthstretching rolls 15, 16, and 17,'18. Between the rolls 15 and 16are steam-spraying pipes 19, 20, and between the roll 16 and thepanthree guide rolls 27 for guiding the fabric at the outlet end of thecasing.

Now between the vat 5 and the rinsing vat 28 I provide the bath 29 whichmay be.

hot water or weak lye. The front guide rolls 30, 31, 32, 33 are forconducting the fabric into the bath and toward the rear guide rollers34, 35 and 36 and the pair of press rolls 37 and 38. At both sides ofthe fabric in the bath I provide stretching chains 39 which whiletraveling from the front toward the rear through the bath 29 graduallymove apart.

The vat 28 is divided into two compartments 40 and 41, of which thecompartment 40 may contain acid and compartment 41 water. The top'of thecompartment 41 is provided with a cover 60.

Now when the fabricleaves the casing 1, it still contains a very littlelye. In the bath 29 the fabric is seized by the two stretching .chainsand gradually stretched to the width it originally possessed-beforebeing mercerized. This stretching of the fabric in width in the hot bathhas the advantage that the fabric does not shrink again because it isimmediately. led into the compartment 40 containing acid. Afurtheradvantage is that the fabric receives a better gloss, this beingparticularly attained by the the removal of the lye. j

The guide rolls 42,43, 44, 451and 46 are provided for conducting thefabric to the pair of squeezing rolls 47, 48. In the compartment- 41 areguide rolls 49, 50, 51'by which the fabric is led toward the pair ofsqueezing rolls 52, 53. For heating the water in the compartment 41 asteam coil 54 is provided.

55 designates a tank containing weak lye and connected by pipes 56 and56 with the spra in" i cs 57 and 57, respectively, for syn-aging fabricwith weak .ly'e. The lye running off the fabric collects in the trough4, overflows onto the bottom 58 whence it can be passed into vat 5 asrequired. Y

It will be readily understood that the width-stretching rolls may bereplaced by ordinary guide rolls without departing from the scope of theinvention.

The hereindescribed process of treating textile fabrics which consistsin steeping the fabric in soda lye for the purpose of mercerization insteaming the fabric to practically fully eliminate the lye, in passingthe fabric through a hot aqueous bath, and in stretching the fabriclaterally of its length while in such bath.

In testimony whereof, I ailix my signature in the presence of twowitnesses.

MAX PETZOLD. Witnesses:

FRANZ SIMON, ERNST LA'rzuL.

